Design Speed given Length of Valley Curve Calculator

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Vertical alignment

Design of Transition Curves and Setback Distances

Design of Superelevation

Marshall Mix Design

Pavement Materials

Sight Distance

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Length of Valley Curve

Length of Summit Curve greater than Sight Distance

Length of Summit Curve Less than Sight Distance

Length of Summit Curve with Grade Angles

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Design of Valley Curve

Length of Valley Curve greater than Stopping Sight Distance

Length of Valley Curve Less than Stopping Sight Distance

✖Length of Curve is the distance along the road where the alignment changes from upward to downward slope, creating a valley-shaped concave.ⓘ Length of Curve [L_s]			+10% -10%
✖Radius of Curve typically represents the minimum radius of the curve.ⓘ Radius of Curve [R]			+10% -10%
✖Rate of Change of Acceleration refers to how quickly the acceleration of an object changes over time.ⓘ Rate of Change of Acceleration [C_a]			+10% -10%

✖Design speed refers to the intended or planned operating speed for a particular section of a roadway or railway.ⓘ Design Speed given Length of Valley Curve [v]

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Formula

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Design Speed given Length of Valley Curve

Formula

`"v" = ("L"_{"s"}*"R"*"C"_{"a"})^(1/3)`

Example

`"4.09752m/s"=("7m"*"2.34m"*"4.2m/s")^(1/3)`

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Design Speed given Length of Valley Curve Solution

STEP 0: Pre-Calculation Summary

Formula Used

Design Speed = (Length of Curve*Radius of Curve*Rate of Change of Acceleration)^(1/3)
v = (L_s*R*C_a)^(1/3)
This formula uses 4 Variables

Variables Used

Design Speed - (Measured in Meter per Second) - Design speed refers to the intended or planned operating speed for a particular section of a roadway or railway.
Length of Curve - (Measured in Meter) - Length of Curve is the distance along the road where the alignment changes from upward to downward slope, creating a valley-shaped concave.
Radius of Curve - (Measured in Meter) - Radius of Curve typically represents the minimum radius of the curve.
Rate of Change of Acceleration - (Measured in Meter per Second) - Rate of Change of Acceleration refers to how quickly the acceleration of an object changes over time.

STEP 1: Convert Input(s) to Base Unit

Length of Curve: 7 Meter --> 7 Meter No Conversion Required
Radius of Curve: 2.34 Meter --> 2.34 Meter No Conversion Required
Rate of Change of Acceleration: 4.2 Meter per Second --> 4.2 Meter per Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

v = (L_s*R*C_a)^(1/3) --> (7*2.34*4.2)^(1/3)

Evaluating ... ...

v = 4.09751981665974

STEP 3: Convert Result to Output's Unit

4.09751981665974 Meter per Second --> No Conversion Required

FINAL ANSWER

4.09751981665974 ≈ 4.09752 Meter per Second <-- Design Speed

(Calculation completed in 00.004 seconds)

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Created by Rahul

Dayanada Sagar college of Engineering (DSCE), banglore

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< 12 Design of Valley Curve Calculators

Total Length of Valley Curve

Go Length of Curve = 2*sqrt((Deviation Angle*Design Speed^3)/Rate of Change of Acceleration)

Design Speed given Total Length of Valley Curve

Go Design Speed = ((Length of Curve/2)^2*Rate of Change of Acceleration/Deviation Angle)^(1/3)

Rate of Change of Acceleration given Total Length of Valley Curve

Go Rate of Change of Acceleration = (Length of Curve/2)^2*Deviation Angle*Design Speed^3

Deviation Angle given Total Length of Valley Curve

Go Deviation Angle = (Length of Curve/2)^2*Rate of Change of Acceleration/Design Speed^3

Design Speed given Length of Valley Curve

Go Design Speed = (Length of Curve*Radius of Curve*Rate of Change of Acceleration)^(1/3)

Radius of Curve given Length of Valley Curve

Go Radius of Curve = (Design Speed^3)/(Length of Curve*Rate of Change of Acceleration)

Rate of Change of Acceleration

Go Rate of Change of Acceleration = (Design Speed^3)/(Length of Curve*Radius of Curve)

Length of Valley Curve

Go Length of Curve = (Design Speed^3)/(Radius of Curve*Rate of Change of Acceleration)

Time given Rate of Change of Acceleration

Go Time = ((Design Speed^2)/Radius of Curve)/Rate of Change of Acceleration

Length of Valley Curve given Time and Design Speed

Go Length of Curve = Design Speed*Time

Design Speed given Length of Valley Curve and Time

Go Design Speed = Length of Curve/Time

Time given Length of Valley Curve and Design Speed

Go Time = Length of Curve/Design Speed

Design Speed given Length of Valley Curve Formula

Design Speed = (Length of Curve*Radius of Curve*Rate of Change of Acceleration)^(1/3)
v = (L_s*R*C_a)^(1/3)

Length of Valley Curve

In transportation or road design, the length of a summit curve refers to the distance necessary for a road to smoothly transition from an uphill segment to a downhill segment while ensuring safe visibility and navigation for vehicles. This is important for the safety of drivers and passengers.

How to Calculate Design Speed given Length of Valley Curve?

Design Speed given Length of Valley Curve calculator uses Design Speed = (Length of Curve*Radius of Curve*Rate of Change of Acceleration)^(1/3) to calculate the Design Speed, Design Speed given Length of Valley Curve formula is defined as the cube root of the product of the length of a curve in a valley, the radius of the curve, and the rate of change of acceleration. Design Speed is denoted by v symbol.

How to calculate Design Speed given Length of Valley Curve using this online calculator? To use this online calculator for Design Speed given Length of Valley Curve, enter Length of Curve (L_s), Radius of Curve (R) & Rate of Change of Acceleration (C_a) and hit the calculate button. Here is how the Design Speed given Length of Valley Curve calculation can be explained with given input values -> 5.394645 = (7*2.34*4.2)^(1/3).

FAQ

What is Design Speed given Length of Valley Curve?

Design Speed given Length of Valley Curve formula is defined as the cube root of the product of the length of a curve in a valley, the radius of the curve, and the rate of change of acceleration and is represented as v = (L_s*R*C_a)^(1/3) or Design Speed = (Length of Curve*Radius of Curve*Rate of Change of Acceleration)^(1/3). Length of Curve is the distance along the road where the alignment changes from upward to downward slope, creating a valley-shaped concave, Radius of Curve typically represents the minimum radius of the curve & Rate of Change of Acceleration refers to how quickly the acceleration of an object changes over time.

How to calculate Design Speed given Length of Valley Curve?

Design Speed given Length of Valley Curve formula is defined as the cube root of the product of the length of a curve in a valley, the radius of the curve, and the rate of change of acceleration is calculated using Design Speed = (Length of Curve*Radius of Curve*Rate of Change of Acceleration)^(1/3). To calculate Design Speed given Length of Valley Curve, you need Length of Curve (L_s), Radius of Curve (R) & Rate of Change of Acceleration (C_a). With our tool, you need to enter the respective value for Length of Curve, Radius of Curve & Rate of Change of Acceleration and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Design Speed?

In this formula, Design Speed uses Length of Curve, Radius of Curve & Rate of Change of Acceleration. We can use 2 other way(s) to calculate the same, which is/are as follows -

Design Speed = Length of Curve/Time
Design Speed = ((Length of Curve/2)^2*Rate of Change of Acceleration/Deviation Angle)^(1/3)

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